£260 / stuff.tv/SpheroRVR
The RVR pulls off the balance between serious coding and knockabout fun perfectly: it’s a fast, fun all-terrain vehicle that you can throw about without worrying about it breaking; but it also has serious hi-tech chops, being compatible with the best low-cost programming machines around. That means playing with the RVR can be as simple or as complicated as you want: spend hours constructing the most intricate driving routine imaginable, or just gun the motor and tear it up.